InChI=1S/C15H21NO5S/c1-2-14(21-22(18,19)20)10-6-3-4-7-11-15(17)16-12-8-5-9-13-16/h3-4,6-8,10-12,14H,2,5,9,13H2,1H3,(H,18,19,20)/b4-3-,10-6+,11-7+